Twin-Headed Behemoth (BP02-EN017) - Battle Pack 2: War of the Giants Unlimited

During the End Phase, if this card was destroyed on the field and sent to the Graveyard this turn: Special Summon it from the Graveyard, and make its ATK and DEF 1000. Each player can only use the effect of "Twin-Headed Behemoth" once per Duel.